ICD-10-CM · Chapter 6 · G00-G99
G63 Polyneuropathy in diseases classified elsewhere
Excludes 1 (cannot be coded together)
- polyneuropathy (in):
- diabetes mellitus (E08-E13 with .42)
- diphtheria (A36.83)
- infectious mononucleosis complicated by polyneuropathy (B27.0-B27.9 with fifth character 1)
- Lyme disease (A69.22)
- mumps (B26.84)
- postherpetic (B02.23)
- rheumatoid arthritis (M05.5-)
- scleroderma (M34.83)
- systemic lupus erythematosus (M32.19)
Code First
- underlying disease, such as:
- amyloidosis (E85.-)
- endocrine disease, except diabetes (E00-E07, E15-E16, E20-E34)
- metabolic diseases (E70-E88)
- neoplasm (C00-D49)
- nutritional deficiency (E40-E64)
This category is a complete, billable diagnosis code.
No additional specificity is required — submit G63 directly on claims and documentation without a subcode extension.
Last reviewed: September 2026